Slight-contact type sealed bearing

Abstract

The invention discloses a slight-contact type sealed bearing which comprises a bearing outer ring, a bearing inner ring, retainers and rolling bodies, wherein the retainers are arranged between the bearing outer ring and the bearing inner ring, the rolling bodies are arranged in the retainers, outer ring sealing grooves are formed in the inner end surfaces of two sides of the bearing outer ring, and inner ring sealing grooves are formed in the outer end surfaces of two sides of the bearing inner ring; sealing rings are symmetrically arranged between the outer ring sealing groove and the inner ring sealing groove on two sides respectively, grease returning lip rings are arranged on the inner ring end surfaces of the sealing rings, normal-contact lip rings are arranged on the inner ring circumferences of the sealing rings and on the same side with the grease returning lip rings, and dustproof lip rings are arranged on the other sides of the inner ring circumferences of the sealing rings. The sealed bearing disclosed by the invention can ensure a sealing effect of the bearing when the bearing inner ring and the bearing outer ring relatively tilt, and meanwhile, can effectively reduce the calorific value of the bearing and reduce the energy loss.

Description

technical field [0001] The invention relates to a bearing, in particular to a light contact sealed bearing, which belongs to the technical field of engineering components. Background technique [0002] At present, there are two contact seal rings on both sides of the main roller, sprocket, side roller and other bearings used on the forklift mast to obtain a good sealing state and prevent grease leakage and external pollutants or water immersion. However, during the use of this kind of bearing, it often happens that the grease leaks heavily on the lip of the sealing ring on one side, while the other side leaks lightly. The reason is that the forklift mast bearing is usually fixed on the inner ring, and When the outer ring moves up and down along the channel steel of the gantry, the center axis of the outer ring and the center axis of the inner ring will be deflected due to the quality state of the channel steel surface and the vibration of the forklift, which will affect the ...

AI Technical Summary

Problems solved by technology

However, during the use of this kind of bearing, it often happens that the grease leaks heavily on the lip of the sealing ring on one side, while the other side leaks lightly. The reason is that the forklift mast bearing is usually fixed on the inner ring, and When the outer ring moves up and down along the channel steel of the gantry, the center axis of the outer ring and the center axis of the inner ring will be deflected due to the quality state of the channel steel surface and the vibration of the forklift, which will affect the seal. The contact state between the ring lip and the sealing groove, and even some areas will form a non-contact state instantly; in addition, the amount of grease injected into this type of bearing usually exceeds 50% of the internal space of the bearing, and when the bearing is running in positive and negative directions, more The grease will be squeezed to the lip of the sealing ring in an instant. If the lip happens to be in a non-contact state at this time, the grease will leak seriously in this area; in traditional contact seal forklift mast bearings, most of them are A single lip is in radial or axial contact, and in order to prevent grease leakage, a large amount of rubber interference is often used, which in turn causes problems such as excessive starting torque of the bearing, rapid wear of the lip, and large heat generation of the bearing. Seriously reduce the service life of the bearing

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